NBash

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#!/usr/bin/env bash
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PATH="..:$PATH"
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# Load argsparse library.
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. argsparse.sh
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# It is possible to have cumulative options with argsparse. Cumulative
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# options can be repeated and all values are kept in an array.
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# To have a cumulative option just declare an option with the
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# 'cumulative' property.
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argsparse_use_option =option1 "A cumulative option" cumulative
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# The user-given values will be stored in the array named
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# cumulated_values_<option name>
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# The cumulativeset property acts exactly like cumulative, except that
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# there can not be any repetition of a value, like in a python 'set'.
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# e.g: In this example, using "--option2 foo --option2 foo" wont add a
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# second 'foo' to option2 list of user-given values.
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argsparse_use_option option2 "A uniqly-cumulative option" \
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	cumulativeset short:O
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# 
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printf -v argsparse_usage_description "%s\n" \
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	"A tutorial script for cumulative options." \
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	"Try command lines such as:" \
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	" $0" \
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	" $0 -h" \
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	" $0 --option1 123" \
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	" $0 --option1 123 -o 456 -o 'foo bar'" \
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	" Also note the difference of behaviour between those 2 lines:" \
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	" $0 --option1 123 -o 123 -o 456 -o 'foo bar' -o 456" \
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	" $0 --option2 123 -O 123 -O 456 -O 'foo bar' -O 456"
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# Command line parsing is done here.
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argsparse_parse_options "$@"
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printf "Options reporting:\n"
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# Simple reporting function.
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argsparse_report
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printf "End of argsparse report.\n\n"
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# 
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if argsparse_is_option_set option1
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then 
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	printf 'option1 has been set %d time(s):\nUser-given values are:\n' \
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		"${#cumulated_values_option1[@]}"
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	printf -- '- %s\n' "${cumulated_values_option1[@]}"
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fi
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if argsparse_is_option_set option2
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then 
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	printf 'option2 has been set %d time(s):\nUser-given values are:\n' \
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		"${#cumulated_values_option2[@]}"
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	printf -- '- %s\n' "${cumulated_values_option2[@]}"
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fi
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